How to use Qt function name

This article mainly introduces "how to use Qt function names". In daily operations, I believe that many people have doubts about how to use Qt function names. The editor consulted various materials and sorted out simple and easy-to-use operation methods. It will be helpful for everyone to answer the doubts about "how to use the Qt function name"! Next, please follow the editor to learn together!

Function name

    //获取保存的文件
    static QString getSaveName(const QString &filter, QString defaultDir = QCoreApplication::applicationDirPath());
    //获取选择的文件
    static QString getFileName(const QString &filter, QString defaultDir = QCoreApplication::applicationDirPath());
    //非阻塞保存文件对话框
    static QString saveFileName(const QString &filter, const QString &defaultDir = "", const QString &fileName = "");
    //获取选择的文件集合
    static QStringList getFileNames(const QString &filter, QString defaultDir = QCoreApplication::applicationDirPath());
    //获取选择的目录
    static QString getFolderName();

    //获取文件名,含拓展名
    static QString getFileNameWithExtension(const QString &strFilePath);
    //获取选择文件夹中的文件
    static QStringList getFolderFileNames(const QStringList &filter);

    //文件夹是否存在
    static bool folderIsExist(const QString &strFolder);
    //文件是否存在
    static bool fileIsExist(const QString &strFile);
    //复制文件
    static bool copyFile(const QString &sourceFile, const QString &targetFile);
    //删除文件夹下所有文件
    static void deleteDirectory(const QString &path);

function body

QString QUIHelper::getSaveName(const QString &filter, QString defaultDir)
{
    return QFileDialog::getSaveFileName(0, "选择文件", defaultDir, filter);
}

QString QUIHelper::getFileName(const QString &filter, QString defaultDir)
{
    return QFileDialog::getOpenFileName(0, "选择文件", defaultDir, filter);
}

QString QUIHelper::saveFileName(const QString &filter, const QString &defaultDir, const QString &fileName)
{
    QString file;
    QFileDialog dialog;
    dialog.setFixedSize(900, 600);
    dialog.setWindowModality(Qt::WindowModal);
    dialog.setWindowTitle("保存文件");
    dialog.setLabelText(QFileDialog::Accept, "保存(&S)");
    dialog.setLabelText(QFileDialog::Reject, "取消(&C)");
    dialog.selectFile(fileName);
    dialog.setNameFilter(filter);
    dialog.setDirectory(defaultDir);

    if (dialog.exec() == 1) {
        file = dialog.selectedFiles().value(0);
        file = QFileInfo(file).suffix().isEmpty() ? "" : file;
    }

    return file;
}

QStringList QUIHelper::getFileNames(const QString &filter, QString defaultDir)
{
    return QFileDialog::getOpenFileNames(0, "选择文件", defaultDir, filter);
}

QString QUIHelper::getFolderName()
{
    return QFileDialog::getExistingDirectory();
}

QString QUIHelper::getFileNameWithExtension(const QString &strFilePath)
{
    QFileInfo fileInfo(strFilePath);
    return fileInfo.fileName();
}

QStringList QUIHelper::getFolderFileNames(const QStringList &filter)
{
    QStringList fileList;
    QString strFolder = QFileDialog::getExistingDirectory();

    if (!strFolder.length() == 0) {
        QDir myFolder(strFolder);

        if (myFolder.exists()) {
            fileList = myFolder.entryList(filter);
        }
    }

    return fileList;
}

bool QUIHelper::folderIsExist(const QString &strFolder)
{
    QDir tempFolder(strFolder);
    return tempFolder.exists();
}

bool QUIHelper::fileIsExist(const QString &strFile)
{
    QFile tempFile(strFile);
    return tempFile.exists();
}

bool QUIHelper::copyFile(const QString &sourceFile, const QString &targetFile)
{
    bool ok;
    ok = QFile::copy(sourceFile, targetFile);
    //将复制过去的文件只读属性取消
    ok = QFile::setPermissions(targetFile, QFile::WriteOwner);
    return ok;
}

void QUIHelper::deleteDirectory(const QString &path)
{
    QDir dir(path);
    if (!dir.exists()) {
        return;
    }

    dir.setFilter(QDir::AllEntries | QDir::NoDotAndDotDot);
    QFileInfoList fileList = dir.entryInfoList();

    foreach (QFileInfo fi, fileList) {
        if (fi.isFile()) {
            fi.dir().remove(fi.fileName());
        } else {
            deleteDirectory(fi.absoluteFilePath());
            dir.rmdir(fi.absoluteFilePath());
        }
    }
}

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